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<?php
/*
* This file is part of Psy Shell.
*
* (c) 2012-2022 Justin Hileman
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Psy;
use PhpParser\Parser;
use PhpParser\ParserFactory as OriginalParserFactory;
/**
* Parser factory to abstract over PHP parser library versions.
*/
class ParserFactory
{
const ONLY_PHP5 = 'ONLY_PHP5';
const ONLY_PHP7 = 'ONLY_PHP7';
const PREFER_PHP5 = 'PREFER_PHP5';
const PREFER_PHP7 = 'PREFER_PHP7';
/**
* Possible kinds of parsers for the factory, from PHP parser library.
*
* @return array
*/
public static function getPossibleKinds(): array
{
return ['ONLY_PHP5', 'ONLY_PHP7', 'PREFER_PHP5', 'PREFER_PHP7'];
}
/**
* Default kind (if supported, based on current interpreter's version).
*
* @return string|null
*/
public function getDefaultKind()
{
return static::ONLY_PHP7;
}
/**
* New parser instance with given kind.
*
* @param string|null $kind One of class constants (only for PHP parser 2.0 and above)
*
* @return Parser
*/
public function createParser($kind = null): Parser
{
$originalFactory = new OriginalParserFactory();
$kind = $kind ?: $this->getDefaultKind();
if (!\in_array($kind, static::getPossibleKinds())) {
throw new \InvalidArgumentException('Unknown parser kind');
}
$parser = $originalFactory->create(\constant(OriginalParserFactory::class.'::'.$kind));
return $parser;
}
}
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